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Re: Domestic pool turnover rates

Would you believe I don't have access to that?

Teapot, you do not have permission to access this page. This could be due to one of several reasons:

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Re: Domestic pool turnover rates

Whoa! I don't get that! And I cannot change it.

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Re: Domestic pool turnover rates

Yep I remember a couple of paragraphs when I was emailed by Ben, especially "don't sell or promote stuff" I thought I was already in the special pool section as Ben or a Mod had to approve my first posts. If you need/want me to add something to make it clear to my signature etc please say so or can you carry that out? Just trying to be straight.

Re: Domestic pool turnover rates

Originally Posted by Teapot

Your pool looks good Richard but there is extra electricity being used for the booster pump for the pressure side cleaner, I just use a Pool Blaster max now days although I can of course use the old vacuum head and hose should anything happen but it hasn't and less work is required now to look after the pool.

Richard uses ThePoolCleaner (I do too) which does not require a booster.

Just like Mark's study on turnover it appears we need a lot less turnover than previously thought. If I had less trees I would almost certainly reduce the run time but as I said you can only skim the surface if the equipment is running.

Re: Domestic pool turnover rates

I switched to 4-wheel pressure The Pool Cleaner when I switched to a Pentair Intelliflo VF pump. Prior to that I had a single-speed pump and a separate booster pump for a Letro Legend pool cleaner. I'm very happy with The Pool Cleaner, but I have a cover on the pool most of the time so don't get a lot of debris. I clean out the cleaner bag no more than once a week and can usually go longer between emptying the bag. When the cleaner is on, it's at 15 GPM, 2180 RPM, 540 Watts for 2 hours each night (I have a Jandy valve that switches the main pump to a dedicated line for the cleaner). I don't need to run it that often, but I never know which day is going to get the debris and my wife swims nearly every day and doesn't want debris in the pool. When the solar is on at 48 GPM that's 1500 Watts and when it is off at 26 GPM it's 300 Watts.

Re: Domestic pool turnover rates

Richard,
I've read your posts with interest (as I almost always do). I'm baffled by one thing: Why do your solar panels require so much pressure? While I've long been an advocated of "More Flow = More Heat Energy", it seems awfully high and from what I've seen of solar panels, they are prone to leaking when the pressure is too high--I run mine on low speed all the time. When I bump the pump to high, I either turn off the panels, or shut their valves down to a crack, a trickle, to prevent them leaking. Of course FantaSea panels, nifty as they are, are far more fragile than the flexible roll-up types. I'm always checking for and repairing leaks.

As for the lower TA: I'm pretty sure it wasn't Ben who first put the concept forward. I thought it was one of the pool pros--or you--who suggested it (guess it wasn't you). Of course, in practice many of us have found it to be VERY effective to countering rising pH. Rising pH seems more mysterious than falling pH, which is almost always easy to trace, usually to Tri-Chlor or even Di-Chlor. Only with new or newly resurfaced hard (concrete/plaster) sided pools is rising pH expected.

But rising pH can be, as you know, an adverse effect of an SWCG. Many people complain about it. Yet I don't seem to have that problem and haven't in the 3 seasons I've had the SWCG. In fact, my pH has been pretty constant since I re-opened (and the Tri-Chlor tabs ran out) at 7.5-7.6 Yet my TA is around 170 due to the local water. Since pH IS stable, it ain't broke, so I'm not fixin' it!

Re: Domestic pool turnover rates

Not to answer for CG but for solar panels on a roof with a VRV installed on the roof, you must have positive pressure at the VRV to keep it closed. Pressure drops with elevation so on a two story roof, you must have at least 11-15 PSI on the filter in order for the VRV to remain closed. A one story is better at 5-7 PSI filter pressure.

Carl, if I remember correctly, I believe your panels are in your deck so you can easily run on low speed to run the panels.

Lowering of the VRV would also allow someone to run at low speed on a two story roof but you still need to prime the panels on high speed so the controller must support that.

Re: Domestic pool turnover rates

Thanks, Mark. Yes, it's correct that my solar panels are part of my deck and priming them is only an issue in the spring because they were drained for the winter. Other panels I've used have also not been elevated so I've no experience with the control valves needed.

Re: Domestic pool turnover rates

The recommended flow rate for my solar panels is 4 GPM per panel and I have 12 panels in parallel so that's 48 GPM. I could run slower with somewhat less efficiency. Even going from 4 GPM per panel to 3 GPM per panel (which is the "minimum recommended") only drops efficiency from 80% to 70% while energy usage would drop from 1500 Watts down to less than 900 Watts. Or I could split the difference and do 3.5 GPM per panel at less than 1200 Watts. I've considered doing that, but haven't changed to it yet. My wife often swims earlier in the day so needs the heating to occur more quickly, but it's a dance for how high to get the temperature the night before so that it is warm enough at the start of the next day.

The other reason my pump energy cost is pretty high when solar is running is that I have a long 75 foot pipe run to and then from the solar system on the single-story roof. I lose 1.2 PSI because my PB used 2" pipe instead of 2.5" (or 3") plus the 12 panels are spread over 3 different roof hips over the length of the house. Also, marginal electricity rates are high at 35 cents per kilowatt-hour (or more). My filter pressure with solar at 48 GPM is roughly 24 PSI which is high (55 feet of head) where the highest point of solar on the roof is perhaps 20 feet high so the rest is largely inefficiency in the piping and outlets. I'm sure I could operate at a slower flow rate without the VRV opening since 36 GPM with solar on is roughly 16 PSI in my pool system.